Soldering bit



Oct 5 1926.

L. JARKOVSKY SOLDERING BIT Filed Dec. 5, 1924 a v J ///a\\\\\ lg? V ////////r/////Ar/ Patented Oct. 5, 1926.

UNITED STATES mmsmv miixovskv, or VIENNA. Ans/ruin, AssIeieoa To run FIRM SPEZIAL- iiizonznn- UND mmuwatzwnnx A. a, or VIENNA, AUSTRIA.

soLimmNe BIT.

Application flied December My invention relates to soldering bits having a hollow head containing one or more substances which melt on heating the head to the temperature required for soldering and aresolidifi'ed when the soldering bit is in use and in so solidityinggive on their latent melting heath In the soldering hits as heretofore constructed the head is made of copper and this is foundto be objectionable because the wallet the copper head is attacked or dissolved by the said substance or substances acting asheat accumulators, whereby the soldering bit is rapidly destroyed. v

The object of my invention is to obviate this inconvenience and thereby to increase the life of the soldering bit. i a 7 With the object in view I make according to my present invention the hollow head of the soldering bit, that is to say thereceptaclec for the. heat accumulating substances oi: a material-indifferent to thesaid heat accumulating substances, that is to say I use-for making the hollow head a substance not attacked by or not soluble in the heat accumulating substance. 6

Further objects and features will be -fully explained later 'on and claimed in the ap pended claims.

In the annexed drawingFigs. 1 2' are longitudinal sections of two different embodiments of 'my invention. 7 p

1 is the copper tip of the soldering bit secured in the head 5 enclosing a hollow space? for receivin the heatac'cumulating substance, 6 is the andle of the soldering bit. The heat accumulating substance consists of a substance or a mixture o'f 'substances undergoing within the temperature limits of the soldering process a reversible change of state. For instance zinc may be used as a heat accumulating substance, but I prefer to use an alloy and more particularly the eutectic alloy of zinc and aluminium consisting of 95 parts by weight of zincgand 5 parts by weight of aluminiunu Tha'tis, I use a zi'ncous material, which terin #zinceus designates zinc or an alloy oi zinc. ,The melting temperature of this allo lis 380 centigrade, its specific heat is Q .117 and its latent melting heat is"30.5 calories If this eutectic alloy be usedasa heat accumulator the hollow head or the soldering bit is made of iron and preferably attest iron as iron is not attacked by or soluble in :cfew threaded projection? 5, 1924. Serial No. 7 5 1:,1 76, and in Austria December 11, 1923.

this alloy. Th life of the soldering bit is thus greatly, increased. a

In order to prevent the heat accumulating substance from coming into contact with the copper tip 1 which is liable to be rapidly do strayed by such contact, I prefer to secure 1 2 tip 1 on the head 5 in such a manner that this bit is entirely outside of the hollow space 7 i This maybe done as indicated in Fig. 2 by screwing the copper bit 1 on a 66 of the Head. If lll 'b e desired 'to provide anopening in the head opposite the handle 6 for facilitating the casting of the head, I close such opening a plug 10 preferably a "screw plug of 70 iron, or other material "indifferent to the heat. accumulatingsubstance. a

In order to prevent the bursting of the hollow head if by accident the soldering bit were heated to a temperature beyond the 7 v'apoui'izing temperature of the heat accun'iulating substance I provide the handle 6 with a ventchannel 9 establishing communication between the hollow space 7 of the head afndthe atmosphere and into this chans .8

'nel I insert a plug 11 vof some suitable material say copper snugly fitting part of the channel 9 and pro t ect such plug 11 from contact with the heat; accumulating substance bya stopper 120i some suitable retractory material, say asbestos at the inner end of the channel. Thus before the heat accumulating substance begins to vapourize to an appreciable extent, the plug 11 will melt and thus permit the vapours to escape. As the outer end of the tip 1 is worn off inthe use otfthe soldering bit the roper handling might be interfered wit In 'order to avoid this drawback I taper the end of the head 5 next to the tip 1, that is to say I make it frustroc'onical orv frustropyramidal in shape as shown in Fig. 2 so that "theti'p il may be worn o'tf to a great extent without interfering 'with the proper ap' licati'on of the soldering bit to the work. 1

What I, claim is a a p 1., A s (")ld'erin, bit, comprising, a hollow head, a heat accumulating substance Within .thejhead which changes its physical state during heating and cooling t me the head being ofiron and :the'h'eat accumulating substance being'iincous. c

head being of iron and during heating and cooling of the bit, the head being of iron and the heat accumulating substance being a zinc-aluminium alloy.

3. A soldering bit, comprising, a hollow head. a heat accun'uilating substance within the head which changes its physical state during heating and cooling of the bit, the head being or iron and the heat accumulating substance being a eutectic allo of zinc and aluminium.

-l-. It soldering bit, comprising, a hollow head. a heat accumulating SllbSLfillCQ within the head which changes its physical state during heating and ccolin of the bit, the head being of iron ane the heat accumulatin substance being zincous a copper tip connected to the head and wholly out of contact with the heat accumulating sulstance.

iii soldering bit, com] K I head, heat accumulating suust... the head hich changes during heating; and coo he he accumulating substance being a zinc-aluminium alloy. a copper tip connected to the head and wholly out of contact with the heat accumulating substance.

2i soldering bit, comprising, a hollow i, a heataccumulating substance within head which changes it physical state during heating and cooling of the bit, the Lead being of iron and the heat accumulating substance being a eutectic alloy of zinc and aluminium, a copper tip connected to the head and wholly out of contact with the heat accumulating substance.

' soldering bit comprising a handle,

low head enclosine a heat accumulating ance fusible within the limiting temperatures of the soldering process, and a tip. the head being made of a material indili erent to the heat accumulating substance, the tip being screwed on a hollow projection projecting from the outside of l UN. Le the handle and a plug of a mater i. illerent to the heat accumulat .ne' substance being inse ed into the said -OjlC-W projection wher. this substance is irevented from penetrating into the hollow uroiection.

8. A. soldering bit comprising a handle, a hollow head enclosing a heat accumulating substance fusible within the limit temperatures of the soldering process and a tip, the head being'made of a n'iaterial indifferent to the heat accumulating); substance, the tip heiiigscrewed on a hollow projection projecting from the outside of the head opposite the handle and plug of a channel being provided establishingcommunication between the i terior of the head and the iosphere "l plug being inserted into chnnel rial fusible at a temperature lower than the rildll m h plug consists of a mate Yapourizing temperature of the said heat accumulating substance.

9. A soldering bit comprising a handle, a ow head enclosing a heat accumulating 'ance fusible within the limit temperes of the soldering process and a tip, the lead being made of a material indittercut to the heat accumulating substance, the tip being screwed on hollow projection projecting from the outside of the head opposite the handle and a plug of a channel being provided in the handle of such channel establishing communication between the interior of the head and the atmosphere and a plug being inserted into such channel waich plug consists of a material fusible at a temperature lower than the vapourizing temperature of the said heat accumulating substance.

10. A soldering bit comprising a handle, a boll w head enclosing a heat accumulatner substance fusible within the limit temperatures of the soldering process and a tip, the head being made of a material indifferent to the heat accumulating substance, the tip being screwed on a hollow projection projecting from the outside of the head opposite the handle and a plug of a channel being provided establishing communication between the interior of the head and the atmosphere and a plug being inserted into such channel which plug consists of a material fusible at a temperature lower than the Yapourizing temperature of the said heat accumulating substance and a stopper of refractory material indifferent to the heat accumulating substance being inserted into the inner end of the said channel.

11. A soldering bit comprising a handle, a hollow head enclosing a heat accumulatsubstance fusible within the limit temperatures of the soldering process and a tip, the head being made of a material inditl'ercut to the heat accumulating substance, the tip being screwed. on a hollow projection projecting from the outside of the head opposite the handle and a plug of a channel being provided in the handle of such channel establishing communication between the interior of the head and the atmosphere and a plug being inserted into such channel which plug consists of a material fusible at a temperature lower than the vapourizing temperature of the said heat accu mulating substance, and a stopper of re tractor; material indifferent to the heat accumulating substance being inserted into the inner end of the said channel.

12. A soldering bit comprising a handle, a hollow head enclosing a heat accumulat ing substance fusible within the limit tem peratures of the soldering process and a tip. the head being made of a material in difierent to the heat accumulating substance, the tip being screwed on a hollow projection projecting from the outside of the head opposite the handle and a plug of a channel being provided in the handle of such channel establishing communication between the interior of the head and the atmosphere and a plug being inserted into such channel WlllCll plug consists of a mate signature.

ING. J ARKOVSKY-LADISLAUS. 

